Round up double to 2 decimal places

Question

How do I round up currentRatio to two decimal places   let currentRatio   Double  rxCurrentTextField text      Double  txCurrentTextField text    railRatioLabelField text       currentRatio

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Swift 4 2 Xcode 11  Simple to use Extension -  extension Double       func round to places  Int  - gt  Double           let divisor   pow 10 0  Double places           return  self   divisor  rounded     divisor           Use -  if let distanceDb   Double strDistance       cell lblDistance text      distanceDb round to 2   km

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Use a format string to round up to two decimal places and convert the double to a String   let currentRatio   Double  rxCurrentTextField text      Double  txCurrentTextField text    railRatioLabelField text    String format     2f   currentRatio    Example   let myDouble   3 141 let doubleStr   String format     2f   myDouble      3 14    If you want to round up your last decimal place  you could do something like this  thanks Phoen1xUK    let myDouble   3 141 let doubleStr   String format     2f   ceil myDouble 100  100      3 15

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Consider using NumberFormatter for this purpose  it provides more flexibility if you want to print the percentage sign of the ratio or if you have things like currency and large numbers   let amount   10 000001 let formatter   NumberFormatter   formatter numberStyle    decimal formatter maximumFractionDigits   2 let formattedAmount   formatter string from  amount as NSNumber    print formattedAmount     10

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The code for specific digits after decimals is   var roundedString   String format     2f   currentRatio    Here the   2f tells the swift to make this number rounded to 2 decimal places

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if you give it 234 545332233 it will give you 234 54  let textData   Double myTextField text    let text   String format     2f   arguments   textData   mylabel text   text

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Rounded  A swift 5 1 property wrapper Example    struct GameResult        Rounded rule  NSDecimalNumber RoundingMode up scale  4      var score  Decimal    var result   GameResult   result score   3 14159265358979 print result score     3 1416

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Just single line of code    let obj   self arrayResult indexPath row   let str   String format     2f   arguments   Double  obj mainWeight

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Updated to SWIFT 4 and the proper answer for the question  If you want to round up to 2 decimal places you should multiply with 100 then round it off and then divide by 100  var x   1 5657676754  var y    x 100  rounded   100 print y      1 57

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Just a quick follow-up answer for noobs like me   You can make the other answers super easily implementable by using a function with an output  E g     func twoDecimals number  Float  - gt  String      return String format     2f   number      This way  whenever you want to grab a value to 2 decimal places you just type   twoDecimals  Your number here          Simples   P s  You could also make it return a Float value  or anything you want  by then converting it again after the String conversion as follows    func twoDecimals number  Float  - gt  Float      let stringValue   String format     2f   number      return Float stringValue       Hope that helps

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Adding to above answer if we want to format Double multiple times  we can use protocol extension of Double like below   extension Double       var dollarString String           return String format      2f   self           let a   45 666  print a dollarString    will print   45 67

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String format     2f   Double round 1000 34 578  1000     Output  34 58

[swift] Round up double to 2 decimal places

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